1.Repair effect of resveratrol combined with Schwann cell-like cells on sciatic nerve injury in rats
Xing LIU ; Ling ZHENG ; Yu LIU ; Liming YI ; Libing RAO ; Xiaojun JU
Chinese Journal of Neuroanatomy 2024;40(4):485-491
Objective:To explore the repair effect of resveratrol combined with Schwann cell-like cells(SCLCs)dif-ferentiated from adipose-derived stem cells(ADSCs)on sciatic nerve injury in rats.Methods:ADSCs were primarily cultured and induced to differentiate into SCLCs.Cell morphology was observed by scanning electron microscopy.West-ern Blot method was used to detect the expressions of S100 calcium-binding protein β(S100β),p75 neurotrophin receptor(p75NTR),and glial fibrillary acidic protein(GFAP).Rats were randomly divided into Control group(Con-trol),Schwann cell-like cell group(SCLCs),resveratrol group(Res),and resveratrol+Schwann cell-like cell group(Res+SCLCs).Eight weeks after the successful establishment of the sciatic nerve injury model,the sciatic nerve func-tion index(SFI)of each group was detected by footprint experiment;the mechanical withdrawal threshold(MWT)was measured by von Frey filament stimulation needle;The wet weight ratio(WR)of the tibialis anterior muscle was deter-mined by weighing method;Western Blot and RT-qPCR methods were used to detect the expressions of neurotrophin-3(NT-3),nerve growth factor(NGF),insulin-like growth factor-1(IGF-1),and brain-derived neurotrophic factor(BDNF)at the injury site.Results:After 8 days of induction of ADSCs,the cells had elongated poles and increased extracellular components;S100β,p75NTR,and GFAP proteins were highly expressed.After treatment with SCLCs,Res,and Res+SCLCs,the SFI and WR of the treatment groups were significantly better than those of the Control group(P<0.05);the MWT of rats in the Res+SCLCs group and SCLCs group was reduced(P<0.05).Western Blot re-sults showed that the expressions of NT-3,IGF-1,NGF,and BDNF proteins in rats in the Res+SCLCs group were higher than those in other groups(P<0.05);The expressions of NT-3,NGF,and BDNF proteins in rats in the SCLCs group were higher than those in the Control group(P<0.05);the expressions of NT-3 and NGF proteins in rats in the Res group were higher than those in the Control group(P<0.05).RT-qPCR results showed that the expressions of NT-3,IGF-1,NGF,and BDNF mRNA in rats in the Res+SCLCs group were highly expressed;the expressions of NT-3,IGF-1,NGF,and BDNF mRNA in rats in the SCLCs group were higher than those in the Control group(P<0.05);The expressions of IGF-1 and NGF mRNA in rats in the Res group were higher than those in the Control group(P<0.05).Conclusion:Res combined with SCLCs differentiated from ADSCs has a good repair effect on sciatic nerve inju-ry in rats.

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